Method1.Combine the wine, vinegar, water, salt & pepper, soy sauce, garlic and grated onion and pour over the fish fillets and marinade for 1 to 2 hours. 2. When you are ready to prepare the fish, drain thoroughly on paper toweling and coat both sides of the fillets with the bread crumbs.3.Arrange the fillets in single layer in a lightly buttered shallow baking dish.4. Combine the mayonnaise, sour cream and spring onion and spread evenly over the fish. Cover with a thin layer of crumbs and dust with paprika and bake in a hot oven for about ten minutes or until fish is done. Serve with lemon wedges.